Welding-piece for electrically-welded metal-work.



A. F. RIETZEL.

WELDING PIECE FOR ELEOTRIOALLY WBLDED METAL WORK.

APPLICATION FILED JUNE 14, 1913.

1,128,515, Patented Feb16, 1915.

WITNESSES WVE/VTOH 7H mam/v E/F/ETZEL W ATM/{NUS UNITED STATES PATENTorrroE.

'ADOIIPH F. RIETZEL, F CHARLESTOWN, RHODE ISLAND, ASSIGNOR TO UNIVERSALnnncrnre wnnnme COMPANY, or NEW roan, N. Y.,

YORK.

A CORPORATION OF NEW WELDING-PIECE FOR ELECTRICAILY -WELDED METAL-WORK.

Specification of Letters Patent.

Patented Feb. re, 1915.

Original application filed September 16, 1909, Serial No. 517,972.Divided and this application filed June 14, 1913. .SeriaiNo. 773,586.

3 T all whom it may concern:

Be it known that I, ADoLrH F. Rrnrznp, a citizen of the United States,and a resident of Charlestown, in the county of Washington and State ofRhode Island, have invented certain new and useful Improve- -ments inWelding-Pieces for Electrically- Welded Metal-Work, of which thefollowing is a specification.

My invention relates to a metal blank or piece of metal adapted for usewith two pieces of metal to be joined by an electric vention. Fig. 3shows theapplic'ation of the blank illustrated in Fig; 1 to the unitingof two plates or pieces of metal. Fig. t shows the-two pieces united.Fig. 5 shows the applicationof the blank illustrated in Fig. 2

to the welding of'two pieces of metal together and Fig. 6 shows thefinished union.

The blank embodying my invention shown in Fig. 1 is analogous in form toa rivet as to one end thereof since it has a prepared head 1 and a shankadapted to be inserted through a hole extending as a perforationentirely through one of the pieces to be united. The shank or reducedportion, however, is, according to my present invention, suitably formedto permit it to engage with and become welded to the other of the twopieces tobe united by a process of electric welding, which causes theend portion of the shank to become weldedto the other one of the twopieces. One of the ways of so forming said end portion of the blank isto provide it with a taper extending preferably clear around the shankor end portion of the shank and so that said end, being reduced in size,may enter a suitably formed hole in said opposite piece and in which itmay become welded to said piece.

The application of a blank of the pa?- ticular form shown in Fig. 1 tothe union of two plates, sheets or other pieces of metal by the electricwelding of the end portion of the shank to one of said pieces isillustrated in Figs. 3 and 4, wherein the two plates or pieces areindicated by the numerals 2 2', while 4 4. represent respectivelyelectrodes of a welding machine by which electric heat- 1ng current andpressure may be applied to the blank and pieces. As shown, the taperedportion of the blank welding piece preparatory to the application of theheat mg and pressure is arranged to engage the edges of a hole orcavityin one of the pieces 2, ts head being at the outside of theopposite piece. The extent of the taper or length of shank may be suchthat the extremity of the shank will stop short of the outer surface ofthe part 2 when the blank lsentered in the hole, so that a considerablevoid-space will be left to receive the metal rendered plastic by theheat and displaced by the application of the pressure. Upon theapplication of the heating electric current and pressure the plates willbe fastened together as shown in Fig. 4:. The displaced metal willcompletely fill the openin or cavity in the part 2"and the blank wilbecome Welded in said opening, thus unitmg the two pieces by the weldingof the shank of the blank to the piece 2 and by the engagement of thehead with the outer surface of the opposite piece.

The blank welding piece shown in Fig. 2 Instead of being headed on oneend, like the blank in Fig. 1, is reduced or has a taper at both ends topermit it to enter a suitably formed hole in the meeting face ofeach ofthe two pieces to be united and so that the union is efiected by awelding of each end of the blank in a hole in the pieces to be united,the welding being eiiected by the application of the heating current andpressure'after the blank has been arranged between the pieces, as sho nin Fig. 5.

Fig. 6 shows the completed union in which the blank fills the void spacein the pieces 2 2 shown in Fig. 5 and becomes welded to both of them.

In carrying out my invention the taper of the blank such as shown inFig. 1 might be extended soas to provide a partial void space in theupper of the two pieces 2 2' wherein the heated metal displaced in theoperation would be received, but this is not necessary, and the voidspace provided may be confined to the space existing around the shank atits tapered portion when inserted in the cavity or opening in the space2. It

is obvious that in the use of the blank the t5 filed by me as a divisionof the present and cavity or hole for the tapered or reduced end may beprovided by the use of apunch which will perforate-the plate receivingsaid tapered end, as is usual in perforating plates for riveting themtogether and it is further obvious that the blank provided by myinvention is in some respects analogous to an ordinary rivet blank,particularly 1n the case of the form shown in Fig. 1, wherein a head isprovided at one end thereof. In the case of the form shown in Fig. 2,however, there is no head in the true sense of a rivet head and in thiscase, as in the case of the blank Fig. 1, the use of the blank to formthe union involves a true welding of the blank to the pieces to bejoined without necessarily headingthe blank over the outside of eitherpiece. it is likewise evident that the cavity or open- .ing designed toreceive the end of the blank welding piece may be formed in any shapedesired, but that the taper provided on the blank particularly adaptsitto'use in an operation in which the metal is prepared by punching thehole which receives the end of the blank. The form shown in Fig. 2 isparticularly useful, since the union of the two plates can be effectedin such manner that no projection above the outer surface of eitherplate will be left-and two plates will be united firmly by an electricalwelding of the button or blank to both pieces.

The extent to which the tapered end of the blank shall enter theperforation and the angle of the taper are matters of choice.

The form orconstruction of blank herein described is also described inmy original application for patent, filed September 16th 1909, SerialNumber 517 ,972, of which the present application constitutes adivision.

I do not claim herein the method of unit- I ing two pieces of metal byblanks welded in holes in their meeting surfaces nor do I claim theproduct of said process, as these form the subject of claims in anapplication of my original application for patent filed September 16th1909, Serial No. 517,972. What I claim as my invention is 1. An electricwelding blank adapted to be welded between and unite two pieces of metaland having a tapered shank as and for the purpose described. v

2. An electric-welding blank adapted to be welded between and unitetwopieces f metal and tapered at both ends as and for the purposedescribed. 3. An electric weldingnblank adapted to be welded between andunite two pieces of metal and having a tapered shank adapted hole in thetwo pieces to be'united when inserted between them.

6. An electric welding blank adapted to be welded between and unite twopieces of metal and having a shank tapered at its end and adapted topartially enter a hole in the piece to be united. I

7. An electric welding blank adapted to be welded between and unite twopieces of metal, said'blank being reduced at both ends to permit'it toenter holes in the meeting faces of said pieces and to become welded insaid holes by the application of heating electric current and pressure.

Signed at Westerly, in the county of Washington and State of RhodeIsland this Witnesses:

HERBERT L. SMITH, HARBY B.'AGARD.. 4

